Interface transparency to orbital current

Abstract

The transport of spin currents across interfaces is relatively well studied, while the transport properties of orbital currents are just starting to be examined. In Cr/Ni bilayers, the spin-orbit torque (SOT) due to the orbital current generated in the Cr layer is believed to dominate over torques of other origins. In this work, we study SOT in Cr/X/Ni trilayers, where X is an ultra-thin spacer of a different material. Using the SOT as a proxy for the orbital current transferred from the Cr to the Ni layer, we compare Cr/X/Ni results to Pt/X/Ni, the system in which spin current generated in the Pt layer plays a dominant role. We find that across 12 different spacers the apparent interface transparency to the orbital current is comparable or larger than to the spin current.

References in corpus (7)

• Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
• Giant Orbital Hall Effect in Transition Metals: Origin of Large Spin and Anomalous Hall Effects
• Giant orbital Hall effect and orbital-to-spin conversion in 3d, 5d, and 4f metallic heterostructures
• Maximizing Spin-Orbit Torque Generated by the Spin Hall Effect of Pt
• Fully Spin-transparent magnetic interfaces enabled by insertion of a paramagnetic NiO layer
• Orbital Hanle Magnetoresistance in a 3d Transition Metal
• Orbital Magnetic Moment of Magnons

Cited by in corpus (5)

• Orbitronics in Two-dimensional Materials
• Orbital Pumping in Ferrimagnetic Insulators
• Giant orbital Hall effect due to the bulk states of 3D topological insulators
• Theoretical study of orbital torque: Dependence on ferromagnet species and nonmagnetic layer thickness
• Probing quantum geometric nonlinear magnetization via second-harmonic magneto-optical Kerr effect